| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1142 by topic | |
| Leaders | |
| Political entities - State leaders - Religious leaders | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Art and literature | |
| 1142 in poetry | |
| Gregorian calendar | 1142 MCXLII |
| Ab urbe condita | 1895 |
| Armenian calendar | 591 ԹՎ ՇՂԱ |
| Assyrian calendar | 5892 |
| Bengali calendar | 549 |
| Berber calendar | 2092 |
| English Regnal year | 7 Ste. 1 – 8 Ste. 1 |
| Buddhist calendar | 1686 |
| Burmese calendar | 504 |
| Byzantine calendar | 6650–6651 |
| Chinese calendar |
辛酉年 (Metal Rooster) 3838 or 3778 — to — 壬戌年 (Water Dog) 3839 or 3779 |
| Coptic calendar | 858–859 |
| Discordian calendar | 2308 |
| Ethiopian calendar | 1134–1135 |
| Hebrew calendar | 4902–4903 |
| Hindu calendars | |
| - Vikram Samvat | 1198–1199 |
| - Shaka Samvat | 1063–1064 |
| - Kali Yuga | 4242–4243 |
| Holocene calendar | 11142 |
| Igbo calendar | 142–143 |
| Iranian calendar | 520–521 |
| Islamic calendar | 536–537 |
| Japanese calendar |
Eiji 2 / Kōji 1 (康治元年) |
| Javanese calendar | 1048–1049 |
| Julian calendar | 1142 MCXLII |
| Korean calendar | 3475 |
| Minguo calendar | 770 before ROC 民前770年 |
| Nanakshahi calendar | −326 |
| Seleucid era | 1453/1454 AG |
| Thai solar calendar | 1684–1685 |
Year 1142 (MCXLII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.